ETH, Monero, Siacoin, IOTA, Golem, ripple are some of the well known coins which have a practical use. PERL coin came up with a good practice, the coin became opacity coin. What are the remaining alt-coins which have practical usage?
Almost all of the project comes with an idea to be used as a practical use coin but there are several things that fails them.
Sia and IOTA and ripple to some extent are the example of such failure. There was a project Gladius building a decentralized security to counter ddos, don't know how well they've been doing. There even was a coin that was to be used for public bus fares in New zealand and there too was a uber alternative in crypto. Forgot the name already.